Fig. 5. Overview of Cu K-edge XAS results for as-prepared UiO-67-[1Cu][BF4]2 with different Cu-loading (high loading, HL: black; medium loading, ML: grey; low loading, LL: light grey curves) measured at RT. (A) XANES spectra; the inset reports a magnification of the pre-edge peak assigned to 1s → 3d in Cu(ii). Centers. (B) k2-weighted χ(k) EXAFS spectra. (C and D) Magnitude (C) and imaginary part (D) of the FT-EXAFS spectra, obtained transforming the k2χ(k) curves in part (B) in the 2.5–11.0 Å−1 range.
